SLP1.0 into the bios without a tool - how

Im new here, hello to all!
And sorry for my bad english, I hope, everyone can understand, wich I mean.

I want mod a bios manual (insert SLP1.0).
Where I can find a description, what exact I must make (extract bios modules, editing with hex editor...).
I have read here in the forum in the last days very much and now I'm totally confused.
Please, can anyone help me?